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Hottest hot month 八月的熱浪

(added on 2009/10/23)

©2009 SpatioEpi.com
Data source: Hong Kong Observatory
Map created by CUHK SpatioEpi Group

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August is normally one of the hottest months in Hong Kong. It was reported that August 2009 was the hottest August in more than 30 years with temperature reaching 33°C for 10 consecutive days in the month. The map shows the distribution of mean daily outdoor temperature for the month of August in 2000 (a) and 2009 (b). In comparison, it can be seen clearly that the overall mean temperature has increased. This is more obvious in urban areas on Hong Kong Island, and the new towns of Shatin, Tai Po Tsuen Wan. The temperature readings were obtained from the various weather stations distributing throughout Hong Kong (in red), operating under the auspices of the Hong Kong Observatory. The readings at the different stations have been interpolated to cover the whole of Hong Kong.

八月是香港最熱的月份之一。報告指出,二零零九年八月是香港過去三十年最熱的八月,當中超過十天錄得攝氏三十三度高溫。圖示二零零零年(a)和二零零九(b)年八月的每天平均室外氣溫。比較兩圖,明顯地二零零九年的氣溫較高,當中的港島市區和沙田、大埔、荃灣等新市鎮至為明顯。圖中的各區溫度源自香港天文台各個氣象站(紅色標記),數據經處理再平均化,藉以顯示全港每角落的溫度。

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Hot weather and health 嚴熱天氣與健康

Extreme temperature can be detrimental to human health. Heat stroke and heat exhaustion are two medical conditions which can lead to death, if one is exposed to extreme heat without protection. Some diseases, notably skin conditions, are precipitated by hot weather or exposure to UV light. Hot weather may also affect the habitat of insects, the distribution of which can affect the transmission of infection, like dengue fever. On a broader scope, ecologic change accompanying global warming is also an emerging health problem. In the last 50 years, global average surface temperature has risen by 0.65°C. Abnormally high temperature in the summer of 2003 was associated with 35000 more deaths in Europe than in the other years. The extreme temperature can affect the production of staple food, increasing the risks of malnutrition.

極端氣溫影響人體健康。在無預防下暴露於高溫是極之危險,會導致熱衰竭或中暑兩種可致命的情況。一些特別是涉及皮膚的疾病,往往因高溫或暴露紫外光而引發。嚴熱的天氣影響昆蟲生態,改變牠們的地理分佈。由於昆蟲是部份致病病毒的媒介,故此氣溫可以間接影響傳染病的傳播危機,而登革熱便是其一例子。從更闊的層面看,全球暖化不只影響生態環境,更為人類健康帶來隱憂。過去五十年,地球表面氣溫上升了攝氏0.65度。二零零三年,歐洲受熱浪襲擊,令該年夏天的死亡數增加三萬五千人。此外,極端氣溫影響農作物收成,增加營養不良的危機。


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